A blockchain, originally block chain, is a continuously growing list of records, called blocks, which are linked and secured using cryptography. Each block typically contains a hash pointer as a link to a previous block, a timestamp and transaction data....

jekyll new <PATH> installs a new Jekyll site at the path specified (relative to current directory). In this case, Jekyll will be installed in a directory called myblog. Here are some additional details:

No more databases, comment moderation, or pesky updates to install-just your content. Markdown, Liquid, HTML & CSS go in. Static sites come out ready for deployment. Permalinks, categories, pages, posts, and custom layouts are all first-class citizens here.